Door latch



FIG. 1 is a front perspective view of a door latch showing the new design;

FIG. 2 is a left-side, three-quarter perspective view thereof; and,

FIG. 3 is a right-side, three-quarter perspective view thereof.

The broken line showing of the associated appliance is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a door latch, as shown and described. 